Synonyms of perilous in English:

perilous


See US English definition of perilous

See UK English definition of perilous

See Spanish definition of peligroso

adjective

1‘a perilous journey through the mountains’

SYNONYMS
dangerous, fraught with danger, hazardous, risky, unsafe, treacherous
precarious, vulnerable, uncertain, insecure, critical, desperate, exposed, at risk, in jeopardy, in danger, touch-and-go
problematic, difficult
informal hairy, dicey
North American informal gnarly
archaic, humorous parlous
ANTONYMS

safe, secure